That one, near as I could tell, actually falls under the aegis of "dubiously legal." It explicitly describes all characters involved in such acts as being of age, regardless of how their appearances are described. That's either an actual failing of the law (in the USA) or merely muddies the...
I've spent two weeks reporting a story that contains explicit sexual scenes involving a five-year-old. The story is still up. The chapter containing that child porn is still up.
My experience with the report story function can only lead me to believe that either there is no actual moderation...